The fact that their origin had been obscured by the early 18th century suggests that they came from mainland Japan a long time ago.

In 1921, he moved to mainland Japan to study medicine.

In 1944, their missions were transport from mainland Japan to remote islands.

They were similar to yagō, private family names used by commoners in mainland Japan.

Like in mainland Japan, a rank (位階) was also part of the addressing system.

After the end of the war, the division remained on mainland Japan.

In mainland Japan, however, one will be more likely to hear "a yoisho!

Immigrants from mainland Japan numbered several hundred by the 1930s.

They were based there on one-year tours with a visit to mainland Japan at the six-month point.

In mainland Japan, two people drowned after being swept away by rough seas.